/Engine/Source/Editor/UMGEditor/Public/WidgetBlueprintEditorUtils.h
static bool IsUsableWidgetClass ( const [UClass](API\Runtime\CoreUObject\UObject\UClass) * WidgetClass, [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FWidgetBlueprintEditor](API\Editor\UMGEditor\FWidgetBlueprintEditor) > InCurrentActiveBlueprintEditor )